Who Found Helium? History. Helium was discovered in the gaseous atmosphere surrounding the Sun by the French astronomer Pierre Janssen, who detected a bright yellow line in the spectrum of the solar chromosphere during an eclipse in 1868; this line was initially assumed to represent the element sodium. Who discovered helium? History. Helium was discovered
How Long Will A Balloon Arch Last Without Helium? Inside air-filled balloon arch A standard balloon arch made with properly inflated latex balloons will last anywhere from 12 hours to 2 days without any significant issues. How long will a air filled balloon arch last? Inside air-filled balloon arch A standard balloon arch made with
What Gas Is Used To Fill Party Balloons? What is helium? Helium is an inert gas, which means that it does not react with other substances. It has the lowest boiling point of any element at -269C and a low density which is why it is used to make items float. What element is used